A simple route to α-substituted β-(phenylethynyl)-keto-esters has been investigated. Ethyl-substituted phenylpropioloylacetates were obtained as the main products of condensation between ethyl phenylpropiolate and ethyl phenyl-, p-tolyl-, p-methoxyphenyl-, p-chlorophenyl-, and α-naphthyl-acetates in the presence of sodium ethoxide. Two anomalous by-products were tentatively identified.
H. N. Al-Jallo and F. H. Al-Hajjar, J. Chem. Soc. C, 1970, 2056 DOI: 10.1039/J39700002056
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